I have a Mustee Neo Angle shower stall. We have had trouble with a small seeping leak on one wall where the base is fitted with the wall portion of the shower stall. This was caulked when installed 2 years ago. The plumber who installed it has recaulked it again and we still will have a seeping leak on the woodwork at the base. Do you have any suggestions where to caulk or look to see where it could be coming from?